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Radioactive Decay Calculator
Calculate remaining radioactive material and half-life kinetics
Formula: N(t) = N0 × (1/2)(t / t1/2) | N(t) = N0 × e−λt
Where N0 is initial amount, t1/2 is half-life, t is elapsed time, and λ is the decay constant ($\ln 2 / t_{1/2}$).
Where N0 is initial amount, t1/2 is half-life, t is elapsed time, and λ is the decay constant ($\ln 2 / t_{1/2}$).
Decay Parameters
Calculation Results
⚠️ Radioactive decay is governed by statistical probability laws. While predictable for large macroscopic quantities of atoms, calculations for extremely small sample sizes or short observation intervals may exhibit statistical fluctuations (Poisson distribution noise).